How to create objects in blender using matrices
A matrix on its own is not a model, as discussed in the comments. In 3d graphics, 4x4 matrices are normally used to for projections (e.g. camera projection) and transformations (e.g. specifying the location, rotation and scale of an object).

To load a matrix into blender, you best bet would be to export the data from whatever program you are creating it in as a text file like a csv or something and use python to read it in. You will need to use a python script to do anything useful with it anyway.

However, having some experience working with computer vision and related concepts, if you don't understand what a matrix is, and some of the underlying maths, what you are proposing is likely to be exceedingly difficult for you, so I would recommend learning some of the basic concepts first.